Large-scale ecosystem carbon stocks and their driving factors across Loess Plateau
Article 2023 en
Authors
YY
Yang Yang
LL
Liangxu Liu
PZ
Pingping Zhang
Abstract
1 min read
Abstract The large-scale vegetation restoration project on the Loess Plateau increased the ecosystem carbon (C) stocks and affected C budget in arid and semi-arid ecosystems. The specific details affecting the C stocks, their distribution, and dependence on land use and climate were never presented and generalized. We assessed the effects of climate factors and soil properties on ecosystem C stocks through field investigation across the Loess Plateau. The total C stocks in the four ecosystems: forestlands [0.36], shrublands [0.24], grasslands [1.18], and farmlands [1.05] was 2.84 Pg (1 Pg = 10 15 g), among which 30% were stored in topsoil (0–20 cm), 53% in above-ground biomass, and 17% in roots. The total ecosystem C density decreased according to the climate from the southeast (warm dry) to the northwest (cold moist) of the Loess Plateau. The ecosystem C density decreased with increasing temperature (from 5 to 15 °C), but increased with precipitation (from 200 to 700 mm). Variation partitioning analysis and structural equation models indicated that ecosystem C density was more explained by climate compared with soil properties. This supports the theory and empirical findings that large scale pattern of ecosystem C density is predominantly regulated by climate on the Loess Plateau. Our results highlight that grasslands are more predestined to store C compared with the other ecosystems, and the C stored in roots is substantial and should be considered when assessing C stocks and strongly contributes to soil organic matter formation. We suggest that investing in roots can be an effective strategy for meeting part of Loess Plateau C reduction goals to mitigate climate change, which is necessary for validating and parameterizing C models worldwide.
Raphael A. Viscarra Rossel, Lewis Walden, Óscar Serrano, Mingxi Zhang, Zefang Shen, James Z. Sippo, Lauren T. Bennett, Damien T. Maher, Catherine E. Lovelock, Peter I. Macreadie, Connor Gorham, Anna Lafratta, Paul S. Lavery, Luke M. Mosley, Gloria Reithmaier, Jeffrey J. Kelleway, John Barry Gallagher, Sabine Dittmann, María Fernanda Adame, Carlos M. Duarte, Paweł Waryszak, Sabine Kasel, Nina Hinko‐Najera, Rakib Hassan, Madeline Goddard, Alice R. Jones
Raphael A. Viscarra Rossel, Lewis Walden, Óscar Serrano, Mingxi Zhang, Zefang Shen, James Z. Sippo, Lauren T. Bennett, Damien T. Maher, Catherine E. Lovelock, Peter I. Macreadie, Connor Gorham, Anna Lafratta, Paul S. Lavery, Luke M. Mosley, Gloria Reithmaier, Jeffrey J. Kelleway, John Barry Gallagher, Sabine Dittmann, María Fernanda Adame, Carlos M. Duarte, Paweł Waryszak, Sabine Kasel, Nina Hinko‐Najera, ,
Lewis Walden, Óscar Serrano, Mingxi Zhang, Zefang Shen, James Z. Sippo, Lauren T. Bennett, Damien T. Maher, Catherine E. Lovelock, Peter I. Macreadie, Connor Gorham, Anna Lafratta, Paul S. Lavery, Luke M. Mosley, Gloria Reithmaier, Jeffrey J. Kelleway, Sabine Dittmann, María Fernanda Adame, Carlos M. Duarte, John Barry Gallagher, Paweł Waryszak, Paul E. Carnell, Sabine Kasel, Nina Hinko‐Najera,
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